IRS Form 1041: Estate Income Tax Return Filing Guide for Executors

Two Different Tax Returns, Two Different Jobs

Executors usually owe two separate tax filings, and confusing them is one of the most common mistakes.

Form 1040 (the final personal return) covers the deceased's income from January 1 through the date of death. This is filed under their Social Security number, due the following April 15 (or the normal filing deadline). If the deceased was married, you can file a joint return with the surviving spouse for that final year.

Form 1041 (the estate income tax return) covers any income the estate earns after the date of death — interest on bank accounts, dividends from investments, rental income from property, gains from asset sales during administration. This is filed under the estate's EIN, not the deceased's Social Security number.

When Form 1041 Is Required

You must file Form 1041 if the estate earns gross income of $600 or more during the tax year. That threshold is surprisingly easy to hit. A savings account earning interest, stock dividends reinvesting automatically, or a rental property collecting monthly checks will trigger it within a few months.

If the estate has a beneficiary who is a nonresident alien, you must file regardless of the income amount.

Choosing the Estate's Tax Year

Unlike personal tax returns locked to the calendar year, an estate can elect a fiscal year ending on the last day of any month, as long as the first tax year doesn't exceed 12 months.

This flexibility matters because it can change when the estate's first return is due. Choose the first year-end and filing deadline with the estate's accountant, taking care that the first tax year does not exceed 12 months.

Discuss the fiscal year election with the estate's accountant. Once chosen, it can't be changed without IRS permission.

Filing Deadlines

Form 1041 is due by the 15th day of the fourth month after the end of the estate's tax year. For a calendar-year estate, that's April 15. For a fiscal-year estate ending in June, it's October 15.

You can request an automatic 5½-month extension by filing Form 7004. The extension gives you more time to file, but it does not extend the time to pay. Estimated taxes are still due by the original deadline.

What About the Deceased's Final 1040?

File the deceased's final Form 1040 for the period January 1 through the date of death. Report all income earned during that period — wages, Social Security, pensions, investment income, self-employment income.

Write "DECEASED" across the top of the return, along with the person's name and date of death. A court-appointed personal representative claiming a refund on the original return generally does not need Form 1310 if a copy of the court certificate showing the appointment is attached. Other claimants may need Form 1310.

Any income earned after the date of death goes on Form 1041, not on the final 1040.

The Federal Estate Tax Return (Form 706) Is Something Else Entirely

Form 706 is the federal estate tax return. For deaths in 2026, it is generally required when the gross estate plus adjusted taxable gifts exceeds $15 million. An executor may also file below that threshold to elect portability of a deceased spouse's unused exclusion. Most estates don't owe federal estate tax.

However, several states impose their own estate or inheritance taxes with lower thresholds — Massachusetts has a $2 million filing threshold for deaths on or after January 1, 2023, Oregon's threshold is $1 million, and Maryland has both an estate tax and an inheritance tax. Check your state's rules.

Common Mistakes Executors Make With Estate Taxes

Reporting income on the wrong return. Bank interest earned before the death date goes on the final 1040. Interest earned after goes on the 1041. Split the year at the date of death.

Missing the EIN application. You need an estate EIN before you can file Form 1041. Apply online through the IRS — it's free and takes about 10 minutes.

Distributing assets before taxes are settled. If you distribute the entire estate and then the IRS assesses additional taxes or penalties, you're personally liable for the shortfall. Hold back a tax reserve until all returns are filed and accepted.

The Executor's Complete Handbook includes a tax deadline tracker that maps every filing obligation by date, with reminders for estimated payment deadlines and extension requests.